Machine for making tufts on wire brushes



May 6, 1930. w. Hx-:RTZBERG 1,757,367

MACHINE FOR MAKING TUFTS ON WIRE BRUSHES M'y 6, 1930. w. HERTZBERG1,151,367

MACHINE FOR MAKING TUFTS ON WIRE BRUSHES Filed Oct. 3, 1927 .'5Sheets-Sheet 2 //S ATTORNEY' May`6, 1930. w. HERTZBERG 1,757,367

MACHINE FOR MAKING TUFTS ON WIRE BRUSHES Filed 001;. 3, 1927 ssheets-sheet 3 www Patented May 6, 1930 UNITI-:D STATES `'ILLIAM'HERTZBERG, OF BROOKLYN, NEW YORK MACHINE FOR MAKING TUFTS ON WIREBRUSHES Application led Ootolrr` 3, 1927. Serial No. 223,732.

These tufts have heretofore been `formed by hand and my invention isembodied in a ma-` chine for forming these tufts.

It is an object of the invention to produce the tufts quicker, moreuniform in size and more safely tied than by hand work.

It is another important object of the invention to safeguard the handsof the operator which are often injured by the binding wire when tyingtufts by hand, this danger is eliminated by my invention.

With these and other objects in view the invention consists in a novelmachine for the purpose above specified embodying a novel combination ofdevices to obtain its objects; all as hereinafter described and nallypointed out in the appended claims.

In the accompanying drawings which form a material part of thisdisclosure:

Fig. 1 is a front elevation of the machine.

Fig. 2 is a top plan of the machine.

Fig. 3 is a vertical elevation on line 3-3 of Fig. 1.-Parts are shown insection as indicated by said line.

Fig. 4 is a vertical section on line 4-4 of Fig. 2 similar to Fig. 3 butthe vertical twisting shaft 45, is turned 90 deg.

Fig. 5 is a sectional end elevation of the machine on line 5-5 of Fig.1.

Fig. 6 is a detail elevation showing a brush inserted in the machine fortuft forming.

Fig. 7 is a detail section at line 7 7 of Fig. 6, showing a sideelevation of stem guide 55.

Fig. 8 is a side elevation of a brush showing a finished tuft thereon.

Fig. 9 is a plan on line 9-9 of Fig. 3, showing the tuft forming jaws49--50 in section through aperture 53a.

Referring to the drawings Fig. 8 illustrates a twisted wire brush 15 on.which 15a is the tuft, the product of the machine embodying theinvention.

The brush 15 including its stem 15b is formed by other means which donot form a part of this disclosure. Before the tuft forming operation isbegun the wires which form the stem 15a end at the plane indicated byline 8-8 of Fig. 8. They are covered by bristles up to that plane, andthese bristles are in a position like the other brush-forming bristles,radiating outwardly from the stem 15b.

In Fig. 1 numeral 2O indicates a plate suitably supported on legs 21.Plate 20 supports a pillow block 22 supporting at its upper end ajournal 23 in which the horizontal shaft rotates by means of handoperated fly wheel 25. A bracket 26 on block 22 holds a vertical rod 27with fork 27a at its upper end. The lower part of rod 27 is of reduceddiameter, surrounded by a helical spring 28 and guided in an aperture oftable 20. Spring 28 presses fork 27a against shaft 24 and produces abrak-` ing action against shaft 24 to prevent its spinning.

The front part of shaft 24 supports the wire-guide-arm 30 which carriesin a forkshaped portion a wire reel 29 which contains binding wire 31for tying the tufts. The guide arm 30 is fastened to shaft 24 and rotates with the same while reel 29 rotates on shaft 24. A spring 29uprevents reel 29 from spinning freely. The horizontal partof arm 30supports the wire 3l and guides it to the twisting mechanism, for thispurpose arm 30 is provided with apertures 32 and a slot 33 in itsinclined nose piece 30a. There is also a spring 34 mounted on arm 30which may be tightened against wire 31 by means of screw 35 to adjustthe tension of the wire.

To the lower side of table 2O two pillow blocks 40 are attachedextending vertically downward therefrom. These blocks hold a horizontalshaft 41 journalled in their bearings. To one end of this shaft a handwheel 42 is fastened and to the other end a bevel gear 43, which meshesinto a bevel pinion 44 and drives a vertical twisting shaft 45. Ballthrust bearings `46 and a journal 47 hold shaft 45 rotatably on table20. The axis of shaft if extended would pass through the slot 33 and tipof nose piece 30a. An angular plate 48 is fastened to the upper end ofshaft 45. The vertical portion of this plate carries the tuft formingjaws 49 and 50 of which 49 is rigidly fastened to 48, and 50oscillatably mounted thereon on pivot 51.

The tuft' forniingjaws are held in closed position by means Vof ahelical tension spring 52 attached to the lever 509- (see llig. 3). Aninward pressure against y50a opens the slot A53 and aperture 53a in jaws49 and 50. Aperture 53a is in axial .'alinement with shaft A horizontalguide bracket 54 is fastened to plate 48 whereon the stem support 55 isslidably mounted and'can be fastened to bracket 54 by means ofa thumbscrew 56. Stem support 5 5 consists of two liat springs which lie tightagainst each other in their lower/portion and form a c lindrical uide55@L in axial y g f v'alinenient with the aperture 5 3a of the tuftslotted apertures in plate TO.. vertical forming jaws 49v and 50 andwith the vaxis of shaft 24. The free end of the two springs are bentoutwardlyto form lips 55h acting entrance guide *forr the stein of awire brush 15, they facilitate the separation of the springs by thebrush-stem l5b when theV operator presses it downward into the guide,552

The front Jfaces of` angular plate 48 and of jaws 49 and 50 are heldIperpendicular to arm 30 by means of a horizontal stop-plate 70 providedwith a shallow recess at its front end which engages the narrow side ofplate 48. Stopplate is held above table 20 by a block 7l upon which itslides beging held thereon by studs 72 which pass vtl'irough les' 70a onplate 70 is pressed again-st block 7l by a helical compression spring 73which leans against the head of a stud 74. This stud is held in block 7land passes through an aperture in leg 70a. `VVhe'n plate 48 rotatesabout the vertical axis of shaft 45 it alternately escapes from therecess in plate 70 and is arrested thereby as soon as it returns Vto aposition perpendicular to arm .30.

the main part ofthe stem 15b between thev springs 55 to enter into`Guide 55a. He adjusts stern support 55, sliding it on bar 5,4 so that adistance of free stein remains between the bristles forming -the brushand support 55. This distance is shorter than the distance which l5,protrudes'beyond jaws 491 and Q- Whse the brush. is sfere-fly placed-inthe machin@ the erstem pulls' the. Stem and. brush backward so that thebristles touch the support 55 as shown in Fig. l and turns the brushslightly on its axis during this operation. Hereby the tuft'15n at thefront end of the brush is formed as the bristles in front of jaws 49 and50 are bent into .horizontal position in passing through the aperture53a. To facilitate this bending the forward portion. of aperture 53 islightly rounded asindicated in Fig. 9. As the brush was not pulled backas much as the stem protruded beyond the jaws 49-5Q a part thereof willstill protrude therefrom and form a core for the tuft 15a. The operatorthen holds the end of binding wire 3l between the two iingers of hisleft hand approximately at a (Figs. 6 and l) and turns hand wheel 25 afew revolutions; this turns arm 3,0 around the brush aXis and winds thebinding wire 8l tightly upon the stein end l5c which protrudes beyondjaws 49-50 and upon the bristles of the tuft 15a. with which it iscovered. 1When the tuft is sufficiently tied in this manner the operatorstops turning wheel 25 and starts to turn hand wheel 42 still holdingthe end of bindingfwire at a. The turning of tween tuft l5a and point aabout the other part of binding, wire which extends from nose piece 30ato the ltuft l5a about which it was previously twisted. ln this mannerthe tuft is securely tied and the wire prevented fromunraveling. Theoperator then cuts the binding wire at line Z) of Fig, 4 andV bends thetwisted binding wire to lie iiat against the solid portion of the tufthaving its ends imbedded between the radial bristles. The brush is thenremoved from the machine. The whole operation ofrforming a tuft requiresyonly a' few seconds of time.

laying thus described my invention what l claim is new and wish tosecure by Letters Patent is: f

l. ln a machine of the hind described, a frame, a holder adapted tosupport a brush having a stem and brush material surrounding the stern,a shaftronsaid fraine,the stem of a brush in said holder being in axialalinement with said shaft, and Vmeans on said holder for dividing thebrush material into parts and for shaping a tuft from-one part of thebrush material and meanson said shaft for ceiling wire upon the tuftshaped by said holder. j

2. In a machine of the kind described a frame, a holder adapted tosupport a brush having a stern and bristles radiating transverselytherefrom, a shaft on said frame, the

lio

stem of a brush in said holder being in axial

